RU2455539C1 - Airclutch vessel - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: vessel of the airclutch contains hermetisation camera, cord frame, external and internal protector. The surface of the inner frame and the camera is designed along the perimetre of a circle in the form of a circular arc, curved inward the internal cavity of the cylinder.

EFFECT: increased service life of airclutch vessel.

2 cl, 2 dwg

Description

The invention relates to mechanical engineering and can be used to transmit torque.

Known balloon tire pneumatic coupling (AS 213484, IPC F16D 25/04, publ. 12.03.68, Bull No. 10) containing a cord frame, outer and inner tread rings, in which a layer of heat-resistant friction is strengthened on the working surfaces of the balloon rubber.

This technical solution provides the transmission of torque, but has the disadvantage that when transmitting torque from the leading coupling half to the driven coupling half by applying air pressure to the cylinder cavity, the latter tends to take the ring shape in cross section and touches the working surface of the driven coupling half by the equatorial line, resulting in slippage and premature wear of the inner tread in this area.

Another disadvantage is the sagging of the tread layer under its own weight, as well as under the influence of excessive pressure inside the cylinder. With prolonged exposure to significant compressive forces, the material of the inner tread and adjacent sections of the cord carcass and the chamber receive significant residual compressive strain. The residual deformation when overpressure is released from the chamber prevents the restoration of the original dimensions of the cylinder and the gap between the cylinder and the drum, which does not allow the clutch to shut off. With a significant width of the balloon, it is also possible to sag the tread and reduce the gap between the balloon and the drum under the operating conditions of a tire-pneumatic clutch. The lack of clearance between the cylinder and the drum is the reason for the removal of the cylinder from operation, as the coupling becomes uncontrollable.

The closest set of essential features and the technical result achieved is a tire-pneumatic clutch balloon (AS 1698519, IPC F16D 25/04, publ. 15.12.91, Bull. No. 46), containing a sealing chamber, cord frame, outer and inner treads, in which the inner tread and adjacent frame and chamber zones in a section perpendicular to the longitudinal axis of the balloon are made wavy.

The known technical solution provides the transmission of torque, but has the disadvantage that the wave-like frame adjacent to the tread and the chamber has a large deformation stiffness, which reduces the transmitted torque of the tire-pneumatic balloon from the leading coupling half to the driven coupling half.

In addition, it is difficult to straighten a large number of undulating corrugations of the frame from a larger diameter to a smaller one, which leads to a significant reduction in the torque transmitted by the cylinder of the tire-pneumatic clutch.

The technical result of the invention is the elimination of these disadvantages and the creation of a balloon tire-pneumatic coupling of a new design, which allows to increase the life of the tire-pneumatic coupling.

The technical result is achieved by the fact that the surface of the inner tread of the frame and the chamber is made around the circumference in the form of an annular arch, concave into the inner cavity of the container, with a bending depth of 1 to 5% of the width of the inner tread.

The invention is illustrated by drawings:

figure 1 - disconnected coupling, a longitudinal section;

figure 2 - included the clutch, a longitudinal section.

The tire-pneumatic coupling cylinder 1 contains a sealing chamber 2, a cord frame 3, an outer tread 4 and an inner tread 5. The surface of the inner tread 5, the cord frame 3 and the sealing chamber 2 in cross section is made in the form of an annular concave arch 6. Bending depth "a "Annular concave arch 6 is made in the range from 1 to 5% of the width" b "of the inner tread 5. The cylinder 1 covers the drum 7 with a gap 8 and is mounted on the rim 9 without a gap.

Tire-pneumatic clutch operates as follows.

When compressed air is supplied into the cavity of the sealing chamber 2 of the cylinder 1, the gap 8 between the inner tread 5 and the drum 7 decreases, while due to the compression and friction forces between the surface of the inner tread 5 and the cylindrical surface of the drum 7, torque is transmitted (Fig. 2).

When the compressed air is discharged from the cavity of the sealing chamber 2, the inner tread 5 of the cylinder 1 moves away from the cylindrical surface of the drum 7 and a gap 8 appears, the coupling is disconnected (Fig. 1).

When the cylinder 1 is operating under conditions of transmission of significant torques, compressed air with significant pressure (up to 20 kgf / cm ² ) is supplied into the cylinder 1.

An annular concave arch 6 increases the stability of the position of the inner tread 5 in the radial direction after air is discharged from the inner cavity of the cylinder 1 and reduces the residual volumetric deformation, which ensures the preservation of the gap between the inner tread and the drum.

Thus, the proposed design of the cylinder tire pneumatic coupling provides the minimum guaranteed clearance between the inner tread and the drum for the entire period of operation of the coupling and thereby increases its service life.

Claims (2)

1. The balloon tire-pneumatic clutch containing a sealing chamber, the cord frame, the outer and inner protectors, characterized in that the surface of the inner tread of the cord frame and the sealing chamber is made in the form of an annular arch, concave into the inner cavity of the cylinder. 2. The tire-pneumatic coupling balloon according to claim 1, characterized in that the bending depth of the annular concave arch is from 1 to 5% of the width of the inner tread.

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